GOSAT CH4 and CO2, MODIS Evapotranspiration on the Northern Hemisphere June and July 2009, 2010, and 2011

Poster presented by Reginald R. Muskett at the 2013 American Geophysical Union Fall Meeting.

Abstract: The Greenhouse gases Observing Satellite (GOSAT) operational since 2009 provides the ability to monitor CH4 and CO2 near-surface atmospheric concentrations on a global monthly basis. GOSAT utilizes interferometric Fourier Absorption Spectroscopy and Optical Imaging validated with the TCCON stations to achieve 0.3% (CH4) to 0.4% (CO2) accuracy. Changes in CH4 and CO2 concentrations derive from biogeochemical and energy cycles and anthropogenic activities. Our investigation is assessing GOSAT measurements relative to evapotranspiration (ET) and fire/wildfire locations (MODIS) for June and July 2009 through 2011 in two regions of Eurasia. Joint probability density functions identify significant modes with the highest probable values of background levels of CH4 and CO2 to ET. Background levels of CH4, CO2 and ET were not affected by the wildfires of 2010. Regressions of the joint probability modes indicate significant inverse relationships of CH4 and CO2 to ET in the industrialized western Russia region and no significant relationships in the Siberian discontinuous permafrost boreal ecosystem. CH4, CO2 and ET are significantly higher in the Siberian discontinuous permafrost boreal ecosystem region. Heterogeneity of boreal-steppe ecosystems, hydrology (including palsa, thaw lakes and wetlands), physical processes and geomorphology in the discontinuous permafrost zone of Siberian exists. CH4 and CO2 concentrations from anthropogenic activities in the industrialized western Russia region are orders of magnitude less that those in the Siberian discontinuous permafrost boreal ecosystem region. Thus our investigation shows anthropogenic carbon-related activities to be insignificant at the regional scale.

Type: 
Poster